CN116221431A - Bypass valve and water heater comprising same - Google Patents

Abstract

The invention relates to the field of water heaters, in particular to a bypass valve and a water heater comprising the same, wherein the bypass valve comprises a valve body, a water inlet channel, a water outlet channel and a bypass channel are arranged in the valve body, the bypass valve further comprises a valve core assembly, and the valve core assembly is arranged in the bypass channel; the valve core assembly comprises a valve core and a valve seat, a first channel is formed on the valve core or the valve seat, a second channel is formed in a gap between the valve core or the valve seat, and the first channel and the second channel are both communicated with the water inlet channel and the water outlet channel; one end of the first channel, which is close to the water outlet channel, and one end of the second channel, which is close to the water outlet channel, are overlapped and are arranged in an included angle. The invention can ensure that the flow of the bypass channel is not easy to change drastically due to water pressure fluctuation, thereby being beneficial to improving the use experience of users.

Description

Bypass valve and water heater comprising same

Technical Field

The invention relates to the field of water heaters, in particular to a bypass valve and a water heater comprising the bypass valve.

Background

Water heaters are common appliances for heating water. Cold water flows into the heat exchanger of the water heater from the water inlet pipe, and flows out through the water outlet pipe for users after heat exchange and temperature rise of the water and the heat exchanger.

When the user closes the valve to stop water use during the process of using the hot water, the water in the heat exchanger stops flowing. Because the heat exchanger has certain thermal inertia, heat stored on the heat exchanger after fire is closed is continuously conducted to the water in the heat exchanger, so that the water temperature of the part is overhigh, and water cut-off and temperature rise are caused. After the valve is opened again, the user may feel discomfort caused by a section of high temperature water.

A section of bypass pipe is connected between water inlet and outlet pipes in the existing water heater, so that part of cold water does not flow through the heat exchanger, directly flows to a water outlet pipe of the water heater through the bypass pipe, and the part of cold water is used for neutralizing a hot water section caused by water cut-off and temperature rise. The common bypass structure does not have a steady flow function, and when the water pressure of the water inlet pipe fluctuates, excessive or insufficient cold water for neutralizing hot water is easily caused, so that the water temperature of the water outlet is uncontrollable.

Disclosure of Invention

The invention aims to overcome the defect of poor flow regulation of a bypass pipe of a water heater in the prior art, and provides a bypass valve and the water heater comprising the bypass valve.

The invention solves the technical problems by the following technical scheme:

according to a first aspect of the present invention, there is provided a bypass valve comprising a valve body, in which a water inlet channel, a water outlet channel and a bypass channel are provided, the bypass channel being in communication with the water inlet channel and the water outlet channel simultaneously;

the bypass valve further comprises a valve core assembly, and the valve core assembly is arranged in the bypass channel; the valve core assembly comprises a valve core and a valve seat, wherein the valve core can move relative to the valve seat to adjust the opening degree of the bypass valve;

a first channel is formed on the valve core or the valve seat, a second channel is formed in a gap between the valve core or the valve seat, and the first channel and the second channel are communicated with the water inlet channel and the water outlet channel; one end of the first channel close to the water outlet channel is overlapped with one end of the second channel close to the water outlet channel and is arranged in an included angle;

when the valve core moves towards the direction approaching the valve seat, the opening of the second channel is reduced to be completely closed; when the spool moves in a direction away from the valve seat, the opening degree of the second passage increases.

In the scheme, hot water flows out of the water outlet channel of the bypass valve, cold water flows in from the water inlet channel of the bypass valve, and cold water can flow into the water outlet channel and hot water in the water outlet channel from the bypass channel, so that the water temperature of the water outlet channel is reduced, and the influence on user experience caused by overhigh water temperature of the water outlet channel when water is stopped and temperature rises is avoided;

one end of the first channel close to the water outlet channel is overlapped with one end of the second channel close to the water outlet channel and is arranged at an included angle, cold water in the water inlet channel flows into the water outlet channel through the first channel and the second channel respectively, one part of water flow directly flows out of the first channel to the water outlet channel, and the other part of water flow flows through the second channel and is intersected and converged with the water flow in the first channel at the position of one end of the second channel overlapped with the first channel, so that the resistance of the first channel is increased; when the water pressure in the water inlet channel is large, the resistance of the overlapped part is also large, so that the increase of the flow of the bypass channel can be restrained, the flow of the bypass channel is not easy to change drastically due to the fluctuation of the water pressure, and the use experience of a user is improved;

when the valve core moves towards the direction approaching the valve seat, the gap between the valve core and the valve seat is reduced, so that the opening of the second channel is reduced; when the valve element moves in a direction away from the valve seat, a gap between the valve element and the valve seat becomes large, so that the opening degree of the second passage becomes large; thereby changing the total opening of the bypass passage to adjust the mixing ratio of the cold water and the hot water.

Preferably, the second channel comprises a straight channel and a baffling channel, the baffling channel is communicated with the straight channel, the baffling channel and the straight channel are arranged at an included angle with the first channel, the straight channel is communicated with the water inlet channel, and the baffling channel and one end of the first channel, which is close to the water outlet channel, are at least partially overlapped.

In the scheme, the second channel comprises the straight channel and the baffling channel, water in the water inlet channel flows into the baffling channel through the straight channel and flows out towards the overlapping part of the first channel and the baffling channel after flowing out through the baffling channel, so that water flow of the baffling channel is intersected and converged with water in the first channel at the overlapping part of the baffling channel and the first channel, and resistance and pressure increase of the water flow are realized.

Preferably, the valve core is provided with a first direct current wall and a first deflection wall, and the first deflection wall and the first direct current wall form an included angle to be connected to form a step surface;

the valve seat is provided with a second direct current wall and a second baffling wall, and the second baffling wall and the second direct current wall are connected in an included angle to form a step surface; the first straight flow wall and the second straight flow wall are separated to form the straight flow channel, and the first baffling wall and the second baffling wall are separated to form the baffling channel.

In the scheme, a straight flow channel is formed between a first straight flow wall of the valve core and a second straight flow wall of the valve seat at intervals, a flow deflection channel is formed between a first flow deflection wall of the valve core and a second flow deflection wall of the valve seat at intervals, and as the first flow deflection wall is connected with an included angle of the first straight flow wall to form a step surface, the second straight flow wall is connected with an included angle of the second flow deflection wall to form another step surface, when the valve core is matched with the valve seat, the straight flow channel and the flow deflection channel are formed between the two step surfaces at intervals, and the straight flow channel and the flow deflection channel are arranged in an included angle. The straight flow channel and the baffling channel are formed in a way of matching the valve core with the stepped wall surface on the valve seat, the structure is simple, the valve core and the valve seat are convenient to mold and form, and the opening degree of the straight flow channel and/or the baffling channel is convenient to change through the relative movement of the valve core and the valve seat. In addition, the valve core is stepped with the valve seat on one side, which faces the water outlet channel, of the valve seat, so that the valve core can be opened unidirectionally, cold water can enter the water outlet channel from the water inlet channel, and hot water is not easy to flow into the water inlet channel.

Preferably, through holes for communicating the water inlet channel and the water outlet channel are formed in the valve seat along a straight line, the through holes obliquely penetrate through the second baffling wall and the second direct current wall, and the inner cavities of the through holes form the first channel.

In the scheme, the through holes obliquely penetrate through the second baffling wall and the second direct-current wall, so that one end of the first channel is communicated with the direct-current channel, and the other end of the first channel is communicated with the baffling channel and overlapped, thereby realizing the communication arrangement of the first channel and the second channel; meanwhile, the through holes are obliquely formed, and only the straight holes are required to be formed, so that the second refraction wall and the second direct current wall can be penetrated at the same time, and the arrangement of the first channel is facilitated.

Preferably, the first baffle wall corresponds to the second baffle wall, and the first baffle wall can partially cover an opening of the first channel penetrating through the second baffle wall.

In the scheme, the first refraction wall and the second refraction wall correspond to each other, namely the first refraction wall can be opposite to the second refraction wall, and when the valve core moves towards the direction close to the valve seat until the valve core abuts against the valve seat, the first refraction wall abuts against the second refraction wall to close the refraction channel; the first deflector wall can then be brought into close proximity with the second deflector wall until it partially covers the opening of the first channel at the second deflector wall, so that the opening of the first channel is reduced. Therefore, the opening of the first channel and the opening of the second channel are synchronously changed along with the relative movement of the valve core and the valve seat, the opening of the first channel is changed along with the movement of the valve core relative to the valve seat, the overflow adjusting capacity of the bypass channel is further improved, and meanwhile, the opening of the first channel and the opening of the second channel are synchronously increased or decreased, so that when the opening of the bypass valve is changed, the difference between the water quantity in the second channel and the water quantity in the first channel is not too large, the water pressure is reduced by mixing water in the second channel and water in the first channel, and the steady flow capacity of the bypass valve is ensured.

Preferably, the first dc wall and the second dc wall are disposed in parallel;

and/or, the first refraction wall is arranged in parallel with the second refraction wall.

In the scheme, the first direct current wall and the second direct current wall are arranged in parallel, so that interference is not easy to occur when the valve core is matched with the valve seat;

and/or the first baffle wall and the second baffle wall are arranged in parallel, so that the first baffle wall and the second baffle wall are in surface contact when being abutted, the valve core and the valve seat are matched compactly and reliably, and local stress concentration is not easy to occur; meanwhile, the blocking effect on water flow is better when the baffling channel is closed.

Preferably, at least two first channels are arranged, and the at least two first channels are sequentially connected in series;

the number of the second channels is the same as that of the first channels, the second channels are sequentially connected in series, and each first channel is correspondingly connected with one second channel in parallel; one end of each second channel, which is close to the water outlet channel, is overlapped with one end of the corresponding first channel, which is close to the water outlet channel, and is arranged in an included angle.

In the scheme, at least two first channels are connected in series, the number of second channels is the same as that of the first channels and the second channels are correspondingly connected in parallel, and one end of each second channel is overlapped with the corresponding first channel and is arranged in an included angle; the water flows through the first channel and the second channel and then is mixed at the overlapping position of the first channel and the second channel, and then is split, flows through the next first channel and the second channel and then is mixed at the next overlapping position; therefore, when water flows through the bypass channel, the water flows are mixed and split for a plurality of times through the overlapped parts of at least two first channels and a plurality of second channels, and the influence of water pressure on the flow of the bypass channel is further reduced.

Preferably, the valve core assembly further comprises a reset piece; the reset piece is abutted to the valve core and provides driving force for the valve core to move towards the valve seat.

In this aspect, the reset member provides the valve element with a driving force toward the valve seat, and the valve element is driven to move toward a direction approaching the valve seat to reduce the opening of the bypass passage.

Preferably, the reset element comprises a heat-sensitive spring, and the elasticity of the heat-sensitive spring decreases with the increase of temperature.

In the scheme, the reset piece comprises a thermosensitive spring, and the thermosensitive spring is abutted against the valve core and provides driving force towards the valve seat; when water cut-off temperature rise occurs, the water temperature of the water outlet channel is increased, the elasticity of the thermosensitive spring is reduced, the driving force is reduced, and the valve core moves towards a direction away from the valve seat under the action of the water pressure of the water inlet channel so as to increase the opening of the bypass channel; when the water temperature decreases, the elasticity of the heat sensitive spring increases, and thus the driving force increases, so that the spool moves toward the direction approaching the valve seat to decrease the opening of the bypass passage. Therefore, the bypass valve can automatically control the opening of the bypass channel according to the water temperature so as to meet the requirement of neutralizing the hot water.

Preferably, the valve core is arranged at one side of the valve seat facing the water outlet channel, and the heat sensitive spring is arranged at one side of the valve core facing the water outlet channel.

In this scheme, the case sets up in the disk seat one side towards the play water channel, and heat-sensitive spring sets up in the case one side towards the play water channel to heat-sensitive spring can sense the temperature variation of play water channel better, makes heat-sensitive spring can be faster with the temperature rise of play water channel and reduce elasticity, so that the case is kept away from the disk seat and makes cold water inflow play water channel and hot water.

Preferably, the valve core assembly further comprises a spring support, the spring support is fixed on the valve body and arranged on one side, far away from the valve seat, of the valve core, and one end, far away from the valve core, of the heat-sensitive spring is abutted to the spring support.

In this scheme, the spring support is provided with thermal spring installation, and thermal spring's one end butt is in the case, and thermal spring keeps away from the one end butt in the spring support of case, makes thermal spring can be between case and spring support deformation from this, provides the drive power towards the disk seat direction.

Preferably, a spring limit groove is formed in one end, far away from the valve seat, of the valve core, and the heat-sensitive spring is at least partially accommodated in the spring limit groove.

In this scheme, the case is kept away from the one end of disk seat and is set up the spring spacing groove, and the part of thermosensitive spring holds in the spring spacing groove to the cooperation of spring and case of being convenient for makes thermosensitive spring be difficult for disengaging with the case.

According to a second aspect of the present invention there is provided a water heater comprising a bypass valve as described above and a water heater body having a water inlet pipe connected to the water inlet passage and a water outlet pipe connected to the water outlet passage.

In the scheme, the bypass valve is adopted in the water heater, so that when the water heater body is temporarily stopped, and the water outlet temperature of the water outlet pipe of the water heater is increased due to water stopping and temperature rising, cold water of the water inlet pipe flows into the water outlet pipe through the bypass valve, the water temperature of the water outlet pipe is neutralized, and user experience is improved; when the water pressure of the water inlet pipe fluctuates, the bypass valve can play a role in stabilizing flow, and the influence of the fluctuation of the water pressure on the water temperature adjusting effect caused by the change of the cold water flow is avoided.

The invention has the positive progress effects that:

in the invention, one end of the first channel close to the water outlet channel and one end of the second channel close to the water outlet channel are overlapped and are arranged at an included angle, cold water in the water inlet channel flows into the water outlet channel through the first channel and the second channel respectively, wherein one part of water flow directly flows out of the first channel to the water outlet channel, and the other part of water flow flows through the second channel and is intersected and converged with the water flow in the first channel at one end of the second channel overlapped with the first channel, so that the resistance of the first channel is increased; when the water pressure in the water inlet channel is larger, the resistance of the overlapped part is larger, and then the increase of the flow of the bypass channel can be restrained, so that the flow of the bypass channel is not easy to change drastically due to the fluctuation of the water pressure, and the use experience of a user is improved.

Drawings

FIG. 1 is a schematic diagram of a water heater according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of a bypass valve according to an embodiment of the invention.

FIG. 3 is a schematic cross-sectional view of a bypass valve according to an embodiment of the present invention.

Fig. 4 is an exploded view of a valve core and a valve seat according to an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view of a bypass valve when the opening degree is increased according to an embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of a bypass valve when the opening degree is reduced according to an embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of a valve seat according to an embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view of a valve core according to an embodiment of the present invention.

Reference numerals illustrate:

water heater 100

Water heater body 200

Water inlet pipe 300

Outlet pipe 400

Bypass valve 500

Valve body 510

Valve core assembly 520

Valve core 521

First straight flow wall 5211

First baffle wall 5212

Spring limit groove 5213

Valve seat 522

Spool chamber 5221

Second straight flow wall 5222

Second baffle wall 5223

Reset element 523

First channel 524

Second channel 525

Straight flow channel 5251

Flow-folding channel 5252

Spring support 526

Water inlet channel 530

Outlet channel 540

Bypass channel 550

Detailed Description

The invention is further illustrated by means of examples which follow, without thereby restricting the scope of the invention thereto.

The present embodiment discloses a water heater 100, referring to fig. 1, the water heater 100 includes a water heater body 200, a water inlet pipe 300, a water outlet pipe 400, and a bypass valve 500. The water inlet pipe 300 and the water outlet pipe 400 are connected to the water heater body 200, and cold water flows out of the water outlet pipe 400 for users after entering the water heater body 200 from the water inlet pipe 300. The bypass valve 500 is connected between the water inlet pipe 300 and the water outlet pipe 400 for controlling the flow rate of cold water flowing from the water inlet pipe 300 to the water outlet pipe 400 for adjusting the temperature of water.

Referring to fig. 2 and 3, bypass valve 500 includes a valve body 510 and a spool assembly 520. The valve body 510 has a flow path for cold water and hot water to flow therein, and a valve cartridge assembly 520 is provided in the valve body 510 to regulate water flow in the valve body 510.

Wherein, a water inlet channel 530, a water outlet channel 540 and a bypass channel 550 are formed in the valve body 510. One end of the water inlet channel 530 is connected with the water inlet pipe 300, and the other end is connected with the water inlet of the water heater body 200 through a pipe. One end of the water outlet channel 540 is connected with the water outlet pipe 400, and the other end is connected with the water outlet of the water heater body 200 through a pipeline. The bypass channel 550 is disposed between the water inlet channel 530 and the water outlet channel 540, and both ends of the bypass channel 550 are respectively communicated with the water inlet channel 530 and the water outlet channel 540, and water in the water inlet channel 530 can flow into the water outlet channel 540 through the bypass channel 550 to neutralize hot water in the water outlet channel 540.

Referring to FIG. 3, the spool assembly 520 is disposed in the bypass passage 550. In this embodiment, the bypass channel 550 is a straight channel with a circular cross section, and the spool assembly 520 is disposed in the bypass channel 550 along the axial direction of the bypass channel 550.

Referring to fig. 4 and 5, wherein the valve core assembly 520 includes a valve core 521, a valve seat 522, and a return 523. The valve spool 521 is movable relative to the valve seat 522 to adjust the opening degree of the bypass valve 500; the return member 523 can drive the valve element 521 to move in a direction approaching the valve seat 522, so that the valve element 521 is returned.

The valve seat 522 is fixedly disposed in the bypass channel 550, a spool chamber 5221 is disposed in the center of the valve seat 522 along the axial direction of the bypass channel 550, and opposite ends of the spool chamber 5221 penetrate the valve seat 522 and communicate with the bypass channel 550. The spool 521 is provided on the side of the valve seat 522 facing the water outlet passage 540 and is located in the spool chamber 5221. The spool 521 is movable relative to the valve seat 522 in the axial direction of the bypass passage 550 to vary the flow of water from the bypass passage 550.

Referring to fig. 5, a first passage 524 is formed in the valve seat 522, and a second passage 525 is formed in a gap between the spool 521 or a spool chamber 5221 of the valve seat 522, and both the first passage 524 and the second passage 525 communicate with the water inlet passage 530 and the water outlet passage 540; one end of the first channel 524, which is close to the water outlet channel 540, and one end of the second channel 525, which is close to the water outlet channel 540, overlap and are arranged at an included angle.

Cold water in the water inlet channel 530 flows into the water outlet channel 540 through the first channel 524 and the second channel 525, respectively, wherein a part of water flow directly flows out of the first channel 524 to the water outlet channel 540, and the other part of water flow flows through the second channel 525 and is intersected and converged with the water flow in the first channel 524 at the end of the second channel 525 overlapped with the first channel 524, so that the resistance of the first channel 524 is increased; when the water pressure in the water inlet channel 530 is large, the resistance at the overlapping position is also large, so that the increase of the flow of the bypass channel 550 can be suppressed, the flow of the bypass channel 550 is not easy to change drastically due to the fluctuation of the water pressure, and the use experience of a user is improved.

In this embodiment, the included angle between the overlapping portion of the second channel 525 and the first channel 524 is an acute angle, and the first channel 524 and the water flow in the second channel 525 form an acute angle to meet, so that the water flow after meeting is beneficial to continue to flow towards the water outlet channel 540.

When the valve element 521 moves in a direction approaching the valve seat 522, the gap between the valve element 521 and the valve seat 522 becomes smaller, so that the opening degree of the second passage 525 decreases, and the opening degree of the second passage 525 decreases to be completely closed. When the valve element 521 moves in a direction away from the valve seat 522, the gap between the valve element 521 and the valve seat 522 becomes large, so that the opening degree of the second passage 525 becomes large; the opening degree of the second passage 525 is increased, thereby changing the total opening degree of the bypass passage 550 to adjust the mixing ratio of the cold and hot water.

In this embodiment, the first passage 524 is disposed on the valve seat 522; in other embodiments, the first passage 524 may be provided on the valve core 521. Specifically, the valve seat 522 is provided with a plurality of through holes which are communicated with the water inlet channel 530 and the water outlet channel 540 along a straight line, the plurality of through holes are arranged along the circumferential direction of the valve seat 522, and the inner cavity of the through holes forms the first channel 524. The valve element 521 can partially block the opening of the first passage 524, so that the opening of the first passage 524 decreases as the valve element 521 moves toward the valve seat 522, and the opening of the first passage 524 increases as the valve element 521 moves away from the valve seat 522, further improving the capacity of adjusting the excessive flow of the bypass passage 550. Meanwhile, the opening of the first channel 524 and the opening of the second channel 525 are synchronously increased or decreased, so that when the opening of the bypass valve 500 is changed, the difference between the water quantity in the second channel 525 and the water quantity in the first channel 524 is not excessively large, the water in the second channel 525 and the water in the first channel 524 are mixed, the water pressure is reduced, and the steady flow capacity of the bypass valve 500 is ensured.

When the valve core 521 shields the opening of the first channel 524, at least part of the opening of the first channel 524 is always exposed, so that the first channel 524 is always kept at least partially communicated between the water inlet channel 530 and the water outlet channel 540.

Referring to fig. 5 and 6, in the present embodiment, the second channel 525 includes a direct current channel 5251 and a baffle channel 5252, the baffle channel 5252 is communicated with the direct current channel 5251, and the baffle channel 5252 and the direct current channel 5251 are disposed at an included angle with the first channel 524. The straight flow path 5251 communicates with the inlet passage 530 and the baffle path 5252 at least partially overlaps the end of the first passage 524 adjacent the outlet passage 540. Water in the water inlet channel 530 flows into the baffle channel 5252 through the direct current channel 5251 and flows out towards the overlapping part of the first channel 524 and the baffle channel 5252 after being deflected by the baffle channel 5252, so that water flow of the baffle channel 5252 is intersected and converged with water in the first channel 524 at the overlapping part of the baffle channel 5252 and the first channel 524, and the resistance and pressure increase of the water flow are realized so as to achieve the steady flow effect.

Specifically, referring to fig. 5 to 8, in the present embodiment, the valve core 521 has a first through-flow wall 5211 and a first baffle wall 5212. The first baffle wall 5212 is disposed toward the inlet channel 530, and the first baffle wall 5212 is connected to the first flow wall 5211 at an angle to form a stepped surface disposed toward the valve seat 522. The spool chamber 5221 has a second direct flow wall 5222 and a second refractive wall 5223. The second straight flow wall 5222 is parallel to the axial direction of the bypass channel 550, the second baffle wall 5223 is disposed toward the water outlet channel 540, the second baffle wall 5223 and the second straight flow wall 5222 are connected at an included angle to form a step surface, and the step surface is disposed toward the valve core 521, so that the diameter of the opening of the valve core cavity 5221 toward the water outlet channel 540 is larger than the diameter of the opening of the valve core cavity 5221 toward the water inlet channel 530. The first and second straight walls 5211, 5222 are spaced apart to form a straight channel 5251 and the first and second baffle walls 5212, 5223 are spaced apart to form a baffle channel 5252.

When the valve core 521 is matched with the valve seat 522, a direct flow channel 5251 and a baffling channel 5252 are formed between the two step surfaces at intervals, and the direct flow channel 5251 and the baffling channel 5252 are arranged at an included angle. The direct flow path 5251 and the baffle path 5252 are formed by the way that the valve core 521 is matched with the stepped wall surface of the valve core cavity 5221, the structure is simple, the die sinking forming of the valve core 521 and the valve seat 522 is convenient, and meanwhile, the opening degree of the direct flow path 5251 and/or the baffle path 5252 is convenient to change by the relative movement of the valve core 521 and the valve seat 522. In addition, the side of the valve core 521, which is matched with the valve seat 522, is in a step shape, so that the valve core 521 is limited on the side of the valve seat 522 facing the water outlet channel 540, and further, the valve core 521 can be opened only in one direction, cold water can enter the water outlet channel 540 from the water inlet channel 530, and hot water is not easy to flow into the water inlet channel 530.

The first passage 524 is inclined through the second baffle wall 5223 and the second straight wall 5222 such that one end of the first passage 524 communicates with the straight passage 5251 and the other end communicates with and overlaps the baffle passage 5252, thereby achieving a communication arrangement of the first passage 524 with the second passage 525. Meanwhile, the through holes are obliquely formed, and only the straight holes are required to penetrate through the second refraction wall 5223 and the second direct current wall 5222 at the same time, so that the first channel 524 is convenient to set.

Referring to fig. 5 and 6, when the valve body 521 moves toward the valve seat 522 until the valve body 521 abuts against the valve seat 522, the first baffle wall 5212 abuts against the second baffle wall 5223 to close the baffle passage 5252; at this time, the first baffle wall 5212 can partially cover the opening of the first channel 524, so that the opening of the first channel 524 is reduced. Thereby realizing that the opening degrees of the first passage 524 and the second passage 525 are synchronously changed with the relative movement of the spool 521 and the valve seat 522.

Referring to fig. 5 to 8, at least two first straight flow walls 5211, first baffle walls 5212, second straight flow walls 5222, and second baffle walls 5223 are provided. The first refraction walls 5212 are connected between two adjacent first direct current walls 5211, and the second refraction walls 5223 are connected between two adjacent second direct current walls 5222. So that the spool 521 has a stepped shape with a diameter gradually increasing in a direction toward the water outlet passage 540, and the spool chamber 5221 has a stepped shape with an opening diameter gradually increasing in a stepped shape.

Along the extending direction of the first channels 524, at least two first channels 524 are arranged, each first channel 524 penetrates through the connected second direct current wall 5222 and the second baffle wall 5223, and the at least two first channels 524 are sequentially connected in series and are located on the same straight line. The number of the second channels 525 is the same as that of the first channels 524, the second channels 525 are sequentially connected in series, and each first channel 524 is correspondingly connected with one second channel 525 in parallel; one end of each second channel 525, which is close to the water outlet channel 540, overlaps with one end of the corresponding first channel 524, which is close to the water outlet channel 540, and is disposed at an included angle. The water flows through the first channel 524 and the second channel 525 and then mixes at the overlapping position of the two channels, and then the water flows are split again and mixed at the next overlapping position after flowing through the next first channel 524 and the next second channel 525 respectively. Thus, when the water flows through the bypass channel 550, the water flows are mixed and split for a plurality of times through the overlapping parts of the at least two first channels 524 and the plurality of second channels 525, and the influence of the water pressure on the flow of the bypass channel 550 is further reduced.

Specifically, in this embodiment, three first dc walls 5211, three first dc walls 5212, three second dc walls 5222, and three second dc walls 5223 are all provided, so that three first channels 524 are connected in series, three second channels 525 are connected in series, and the water flows through three mixing, depressurization and steady flows. In other embodiments, the number of first and second straight walls 5211, 5212, 5222, 5223 can be any other suitable value.

In this embodiment, a first straight wall 5211 on the side of the inlet channel 530 is inclined to the axis of the bypass channel 550 so that water flows from the spool chamber opening 5221 into the spool chamber and then flows into the second channel along the inclined first straight wall 5211. The other first dc walls are parallel to the axial direction of the bypass channel 550 and parallel to the second dc wall 5222, so that the first dc wall 5211 and the second dc wall 5222 are not easy to interfere when the valve core 521 is matched with the valve seat 522. In other embodiments, a first straight wall 5211 adjacent to one side of the inlet channel 530 may also be disposed parallel to the axis of the bypass channel 550 or parallel to the corresponding second straight wall 5222.

In this embodiment, the first baffle wall 5212 and the second baffle wall 5223 are disposed in parallel, so that the first baffle wall 5212 and the second baffle wall 5223 are in surface contact when in abutting contact, so that the valve core 521 and the valve seat 522 are matched compactly and reliably, and local stress concentration is not easy to occur; and simultaneously, the baffle channel 5252 has better blocking effect on water flow when being closed. In other embodiments, the first baffle wall 5212 and the second baffle wall 5223 can be provided in other suitable arrangements.

Referring to fig. 5, in the present embodiment, the restoring member 523 includes a heat sensitive spring, and the valve core assembly 520 further includes a spring support 526. The spring support 526 is annular, and the spring support 526 is fixed to the valve body 510 and is disposed on a side of the valve element 521 away from the valve seat 522. One end of the heat-sensitive spring is abutted to the valve core 521, one end of the heat-sensitive spring far away from the valve core 521 is abutted to the annular surface of the spring support 526, and water is supplied to the water outlet channel 540 through a hole in the middle of the spring support 526. The end of the heat sensitive spring remote from the valve core 521 abuts against the spring seat 526, thereby enabling the heat sensitive spring to deform between the valve core 521 and the spring seat 526, providing a driving force in the direction of the valve seat 522.

In addition, in other embodiments, the restoring member 523 may also include a rod of a thermally expandable material, through which the valve core 521 is moved by thermal deformation.

Wherein the elasticity of the heat-sensitive spring decreases with increasing temperature. When the water cut-off temperature rise occurs, the water temperature of the water outlet passage 540 rises, the elasticity of the heat sensitive spring decreases, the driving force of the heat sensitive spring decreases, and the valve core 521 moves away from the valve seat 522 under the water pressure of the water inlet passage 530 to increase the opening of the bypass passage 550; when the water temperature decreases, the elasticity of the heat sensitive spring increases, and thus the driving force increases, so that the spool 521 moves toward the direction approaching the valve seat 522 to decrease the opening of the bypass passage 550. Thereby, the bypass valve 500 can automatically control the opening degree of the bypass passage 550 according to the water temperature to satisfy the demand for neutralizing the hot water.

Wherein, spring support 526 and heat-sensitive spring set up in the case 521 towards the one side of play water channel 540 to heat-sensitive spring can better feel the temperature variation of play water channel 540, make heat-sensitive spring can be faster with the temperature rise of play water channel 540 and reduce elasticity, so that case 521 is kept away from disk seat 522 and makes cold water inflow play water channel 540 and hot water.

The valve core 521 is provided with a spring limit groove 5213 at one end far away from the valve seat 522, and the thermosensitive spring is at least partially accommodated in the spring limit groove 5213, so that the cooperation of the spring and the valve core 521 is facilitated, and the thermosensitive spring is not easy to separate from the valve core 521.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (13)

1. The bypass valve comprises a valve body, wherein a water inlet channel, a water outlet channel and a bypass channel are arranged in the valve body, and the bypass channel is simultaneously communicated with the water inlet channel and the water outlet channel; the method is characterized in that:

the bypass valve further comprises a valve core assembly, and the valve core assembly is arranged in the bypass channel; the valve core assembly comprises a valve core and a valve seat, wherein the valve core can move relative to the valve seat to adjust the opening degree of the bypass valve;

a first channel is formed on the valve core or the valve seat, a second channel is formed in a gap between the valve core or the valve seat, and the first channel and the second channel are communicated with the water inlet channel and the water outlet channel; one end of the first channel close to the water outlet channel is overlapped with one end of the second channel close to the water outlet channel and is arranged in an included angle;

when the valve core moves towards the direction approaching the valve seat, the opening of the second channel is reduced to be completely closed; when the spool moves in a direction away from the valve seat, the opening degree of the second passage increases.

2. The bypass valve of claim 1, wherein the second passage includes a straight passage and a baffle passage, the baffle passage is in communication with the straight passage, the baffle passage and the straight passage are both disposed at an angle to the first passage, the straight passage is in communication with the water inlet passage, and the baffle passage at least partially overlaps the end of the first passage adjacent to the water outlet passage.

3. The bypass valve of claim 2 wherein the spool has a first flow wall and a first flow deflection wall, the first flow deflection wall being connected at an angle to the first flow deflection wall to form a land;

the valve seat is provided with a second direct current wall and a second baffling wall, and the second baffling wall and the second direct current wall are connected in an included angle to form a step surface; the first straight flow wall and the second straight flow wall are separated to form the straight flow channel, and the first baffling wall and the second baffling wall are separated to form the baffling channel.

4. A bypass valve as claimed in claim 3, wherein a through hole for communicating the water inlet passage and the water outlet passage is formed in the valve seat along a straight line, the through hole is formed to penetrate the second baffle wall and the second direct current wall in an inclined manner, and an inner cavity of the through hole forms the first passage.

5. The bypass valve as recited in claim 4 wherein the first baffle wall corresponds to the second baffle wall, the first baffle wall being capable of partially covering an opening of the first passage through the second baffle wall.

6. A bypass valve as recited in claim 3, wherein the first straight flow wall is disposed in parallel with the second straight flow wall;

and/or, the first refraction wall is arranged in parallel with the second refraction wall.

7. The bypass valve of claim 1, wherein at least two of the first passages are provided, and at least two of the first passages are connected in series in sequence;

the number of the second channels is the same as that of the first channels, the second channels are sequentially connected in series, and each first channel is correspondingly connected with one second channel in parallel; one end of each second channel, which is close to the water outlet channel, is overlapped with one end of the corresponding first channel, which is close to the water outlet channel, and is arranged in an included angle.

8. The bypass valve of claim 1, wherein the spool assembly further comprises a reset member; the reset piece is abutted to the valve core and provides driving force for the valve core to move towards the valve seat.

9. The bypass valve as recited in claim 8 wherein the return member includes a heat sensitive spring having an elasticity that decreases with increasing temperature.

10. The bypass valve of claim 9, wherein the spool is disposed on a side of the valve seat facing the outlet passage, and the heat sensitive spring is disposed on a side of the spool facing the outlet passage.

11. The bypass valve of claim 9, wherein the spool assembly further comprises a spring mount secured to the valve body and disposed on a side of the spool remote from the valve seat, an end of the heat sensitive spring remote from the spool abutting the spring mount.

12. The bypass valve of claim 11, wherein an end of the spool remote from the valve seat is provided with a spring retention groove, the heat sensitive spring being at least partially received in the spring retention groove.

13. A water heater comprising a bypass valve as claimed in any one of claims 1 to 12 and a water heater body having a water inlet pipe connected to the water inlet passage and a water outlet pipe connected to the water outlet passage.

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